Component Testing

P12A Horn - High Note or P12B Horn - Low Note

1. Ignition/Vehicle - Off
2. Disconnect the appropriate electrical connector: P12A Horn - High Note or P12B Horn - Low Note
3. Connect a jumper wire between the test points: Ground terminal 1 & Ground
4. Momentarily connect a 15 A fused jumper wire between the test points: Control terminal 2 & 12 V

   Verify the component turns On and Off when connecting and disconnecting the jumper wire: P12A Horn - High Note or P12B Horn - Low Note

   • If the component does not turn On and Off 

     Replace the component: P12A Horn - High Note or P12B Horn - Low Note

   • Go to next step: If the component turns On and Off 
5. All OK.

S33 Steering Wheel Horn Contact

1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: S33 Steering Wheel Horn Contact
3. Test for infinite resistance between the test points: Signal terminal 2 & Ground terminal 1 - Not Pressed
   • If less than infinite resistance 

     Replace the component: S33 Steering Wheel Horn Contact

   • Go to next step: If infinite resistance 
4. Test for less than 3 ohms between the test points: Signal terminal 2 & Ground terminal 1 - Pressed
   • If 3 ohms or greater 

     Replace the component: S33 Steering Wheel Horn Contact

   • Go to next step: If less than 3 ohms 
5. All OK.